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#1 | ||
Regular Member
Join Date: May 2010
Location: Gardenvale /Melbourne
Posts: 125
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While attempting to cure slight hesitation when cold , tightened manifold screws ( 90% of them loose ) and in process unwittingly dislodged lead from coil pack to Number 1 . Wife then drove 5 K with misfiring engine. On checking I located the loose lead , replaced it. NO JOY . Tried a new lead , still no spark. Only on number 1. Is there a diagnostic code recorded by the computer , and how do you access it ,to show faulty coil pack ? I have read another post on replacing the coil pack and will do so , but I am checking to see if any shortcut via code and whether any other problems are indicated. Any suggestions in Melbourne for point of supply for new coil pack apart from Ford.
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#2 | ||
FF.Com.Au Hardcore
Join Date: Sep 2005
Location: Stanthorpe QLD
Posts: 745
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it will be the coil pack
ian
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Acid rush txr6,5.1 surround sound,350 rwkw's,major interior trim work. |
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#3 | ||
FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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I would replace the lead, if the coil pack was faulty you would be down 2 cylinders as the AU coil pack uses a "wasted spark" system, one coil firing 2 cylinders at the same time so barring physical damage to the coil terminal the coil pack is unlikely to be faulty on only 1 cylinder
If you don't understand wasted spark check this out http://www.crypton.co.za/Tto%20know/...sted%20sp.html
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[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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#4 | ||
Regular Member
Join Date: May 2010
Location: Gardenvale /Melbourne
Posts: 125
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Thank you au3xr6 , I have already tried a new lead on number 1 , and all others appear to be firing , which cylinder in AU would be firing at the same time as number 1 ? so that I can doubly check spark on that one.
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#5 | ||
FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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1 and 6 are on opposing cycles so they would share the same coil the same applies to 2 and 5, and 3 and 4
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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#6 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Geelong, Victoria
Posts: 4,417
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In wasted spark the current goes in one lead to the plug, then out the other plug and back to coil. So when one of the leads is unplugged accidently, the spark can't return, so I wonder if that is enough to damage the coil?
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#7 | |||
FF.Com.Au Hardcore
Join Date: Sep 2009
Location: Brisbane, Qld
Posts: 683
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Quote:
Are you checking spark at the lead or the spark plug ?
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AU XLS. |
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#8 | |||
FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
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no the HT is induced in the coil and fed to both leads similar to a centre tap transformer supplying 2 different circuits. the HT in both leads goes through the plug to earth not to the other plug
Quote:
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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#9 | |||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Geelong, Victoria
Posts: 4,417
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Quote:
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#10 | ||
Regular Member
Join Date: May 2010
Location: Gardenvale /Melbourne
Posts: 125
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Thanks all , I have been checking for spark by holding plug end connection against earth ( the block) and Number 6 IS FIRING , but with new lead on 1 , still no spark BUT I now notice slight spark type noise when engine switches off. Could it be that I have damaged coil pack terminal for number 1 ? Coil pack will have to come out to do a proper visual check on terminal 1!?
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#11 | |||
FF.Com.Au Hardcore
Join Date: Aug 2006
Location: Salamander Bay
Posts: 5,427
|
Quote:
__________________
[SIGPIC][/SIGPIC]
Everyone starts off with a bag full of luck and an empty bag of experience. The trick is to fill the experience bag before the luck bag is empty. "It is better to remain silent and be thought a fool than to speak out and remove all doubt." Start a new career as a bus driver Rides: FG2 XR6 stock at this stage but a very nice ride xc 4 DOOR X CHASER 5.8 UNDER RESTO |
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#12 | ||
Regular Member
Join Date: May 2010
Location: Gardenvale /Melbourne
Posts: 125
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Thanks again for all advice. Problem solved with new coil pack. Visual inspection revealed that number 1 had been arcing for a long time , possibly since the installation of new ignition leads by the Ford Dealer. I had dislodged it completely without any undue force , and arcing may have continued internally to lose spark completely for number 1 and not affect number 6.
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